1. Sintering Process<\/p>\n

The sintering process of NdFeB permanent magnets is based on powder metallurgy. First, the raw materials need to be carefully prepared. High – purity neodymium (Nd), iron (Fe), and boron (B) are essential components. Then, the raw materials are melted together. After that, a process called hydrogen decrepitation (HD) is carried out. This process helps to break the as – cast alloy into fine powders. Next, the powders are pressed into the desired shape. Sintering is a key step, which is usually carried out at a high temperature. After sintering, a tempering process is necessary to improve the magnetic properties. Finally, mechanical processing and surface treatment are performed to meet the specific requirements of different applications. Sintered NdFeB magnets are widely used in various fields such as electronic information, new energy, automobiles, and medical treatment because of their high energy density and high coercivity.<\/p>\n

2. Bonding Process<\/p>\n

In the bonding process, magnetic powders are mixed with a binder. This mixture can be formed into the desired shape through injection molding or compression molding. Although the bonding – type NdFeB magnets have good plasticity and corrosion resistance, their magnetic performance is relatively lower compared to sintered NdFeB magnets. This type of magnet is suitable for applications where complex shapes are required and high magnetic performance is not the top priority.<\/p>\n

3. Hot Pressing\/Hot Deformation Process<\/p>\n

The hot pressing\/hot deformation process involves applying high temperature and pressure to form the magnetic powders. An advantage of this process is that it can achieve high magnetic performance without using heavy rare – earth elements, which brings cost advantages. This makes it an attractive option for manufacturers who are looking to balance cost and performance.<\/p>\n